John 9:2-4

His disciples asked him, “Teacher, whose sin caused this guy’s blindness, his own, or the sin of his parents?” Jesus answered, “Neither. It happened to him so that you could watch him experience God’s miracle. While I am with you, it is daytime and we must do the works of God who sent me while the light shines. For there is coming a dark night when no one will be able to work.